potts



(No Modem l JnC. POTTS.

ART 8F WEAVING I MI-TATION SEBRSUGKER FABRIC'. N0. 284,145. 1188811888 Aug.lz8, 1888. f

WITNESSES: JJWENTOR: A W85@ gw .Toy all whom, it may concern:

.JOSEPH O. POTTS,

i f UNITED STATES PATENT OFFICE. y

OE EEEWYN, ASSIGNOETO HIMSELE AND JOSEPH H. -coArEs or PHILADELPHIA, PENNSYLvANIA.

ART oF wEAvlNe IMITATION SEERSUCKER FAERIC.

SPECIFICATION `forming part of `Letters Patent `No. 284,145, dated August .m Application filedpril 2, 1883. (No model.) l

Be it known that I, JOSEPH C. Por'rs, a citizen of the United States, residing in` Berwyn,

` `Chester county, Pennsylvania. have invented an Improvement in the Art of VVeavinglini-` tation Seersucker Fabrics, of `which thefollowing is a specification. l The object of iny invention is to make cheapimitationof the well-known seersucker77 fabric, which is studded on one side with projections, due to corresponding pits on the` opposite side, these being caused by the different contractile properties of the silk and l cotton threads of which the fabrieis composed. The imitation fabric is made entirely of cotton or linen threads, in the manner which I` will proceed to explain, reference being had to the accompanying drawings, in

which- Figure 1 is a perspective diagram, illustrating the two sets of warp-threads which I use;

and Fig. 2 an exaggerated plan of the warpthreads and part of the reed.

Itshould be stated that no new mechanismis required to carry my invention into effect, as the fabric can be woven in any "ordinary .A loom. It is not even essential that two warpbeams should be used. For these reasons it has been-deemed best to restrict the illustra-l tions to diagrams, as the best means of conveying to those skilled in weavingoperations y the true charactenofmyinvention.

`The warp consists of alternate sets of two or more threads each, these sets being rep# `resented by the alternate black and `white y stripes a and b in Fig. l, the threads them` selves being too thin to be shown without cre" ating confusion.

It is essential, in weaving the fabriethat one set of warp.- threads should be under greater tension than the other, andthis may `be `brought about by using two.warp-beams,

A and B, one for the set of warp-threads b `and the other for the other set lof warpthreads, different degrees of tension being im# parted to the two sets of threads by usual letoff appliances used in connection with Warpbeams in ordinary looms. We will suppose,

in the present instance, that the black stripes represent fthe slack threads and the white stripes the tight threads ofthe warp.

It is also essential, incarrying out my invention, that there should be more or less friction of the dents of the reed against the slack `waipthreads, while the tight warp-threads vare free between the dents. This may be brought about in two ways: First, the dents of the reed may be uniform throughout, as usual, and the sets of threads indicated by the black lines in Fig. 2 may be .so thick that there Will be considerable friction of the dents against them, while the tight warpl' threads (indicated by the lighter lines in Fig. l

involvesthe necessity of making a special reed.

If the requirements above described are ad hered to and the weaving be proceeded with in the usual manner, the sets of threads will `be fed forward to the shedding devices under different degrees of tension,'and the sets of threads having the least amount of tension will be drawn or moved forward by the fric ftion offthe reed thereon in beating up the weft, the result being the production of a fabric in which plain stripes alternate with shirred or puckered stripes. i

Although .I` have shown two warp-beams, onewarp-beam only may be used, providing that one set of threads is wound more tightly upon it than the other set.

l claim as my invention- Y The improvement herein described in the art of weaving fabrics, which consists in arranging the threads of the warp in alternate sets of two or more threads each, feeding said sets of warp-threads forward to the shedding devices under different degrees of ten- In testimony whereof Ihave signed my naine sion, and moving or drawing forward the sets to this 'specification in the presence of two subof threads having the least amount of tensoribing witnesses.

sion by the friction of the reed thereon, in JOSEPH C. POTTS. 5 beating up the weft, whereby a fabric is pro- Witnesses:

duced having alternate plain and shirred HARRY L. ASHENFELTER,

stripes, as set forth. HENRY HowsoN, J r. 

